Device for protecting the human sensory hearing system while retaining quality sound

ABSTRACT

The present disclosure describes a cost-effective earplug device that delivers minimally distorted sound, offers sound protection, can fit most users, and can protect human hearing from dangerously-high acoustic levels without the cost or inconvenience of a custom earplug.

CROSS REFERENCE

This application claims the benefit of U.S. Provisional Application No.62/284,496, filed Oct. 2, 2015, which is incorporated herein byreference in its entirety.

BACKGROUND

Hearing protection devices can provide hearing protection and deliverminimally distorted sounds of music and speech to a user. However,custom devices are cost prohibitive, and one-size-fits-most devices thatattempt to deliver minimally distorted sound at an affordable price areoften improperly used and thus do not achieve suitable levels ofprotection or sound quality. A one-size-fits-most hearing-protectingdevice that delivers minimally distorted sound, achieves optimal soundprotection, is cosmetically appealing, and ensures a proper fit couldoffer users with a more affordable alternative to custom made products.

INCORPORATION BY REFERENCE

Each patent, publication, and non-patent literature cited in theapplication is hereby incorporated by reference in its entirety as ifeach was incorporated by reference individually.

SUMMARY OF THE INVENTION

In some embodiments, the invention provides a device for attenuating asound entering an ear of a subject, the device comprising:

-   -   a) a first portion, wherein the first portion comprises:        -   i) a sound inlet;        -   ii) a face that faces an ear canal of the subject; and        -   iii) a face that faces away from the ear canal of the            subject,            wherein the first portion is configured to be situated in a            concha of the ear of the subject, and the sound inlet is            positioned to face away from the ear canal of the subject            when the device is inserted in the concha of the ear of the            subject, wherein the first portion comprises a tab that            curves away from the ear canal of the subject when the            device is inserted in the concha of the ear of the subject;    -   b) a hollow tube, wherein the hollow tube is attached to the        face of the first portion that faces the ear canal of the        subject, wherein the hollow tube is positioned to protrude into        the ear canal of the subject when the device is inserted in the        concha of the ear of the subject;    -   c) a first seal, wherein the first seal has a body that has a        wide end and a narrow end, and the body of the first seal tapers        in size from the wide end to the narrow end, wherein the first        seal contains an aperture that is about circular through which        the hollow tube protrudes, and wherein the first seal fits over        the hollow tube at a point that is proximal to the face of the        first portion that faces the ear canal, wherein the first seal        is situated at about the opening of the ear canal of the subject        when the device is inserted in the concha in the ear of the        subject; and    -   d) a second seal, wherein the second seal fits over the hollow        tube at a point that is more distal from the first portion than        the point at which the first seal fits over the hollow tube,        wherein the second seal comprises an open terminus that is        situated inside of the ear canal of the subject when the device        is inserted in the concha of the ear of the subject,        -   wherein the hollow tube is flexible and is positioned to fit            inside the ear canal of the subject, and the hollow tube            houses a sound bore, and        -   wherein the sound bore, the sound inlet, and the open            terminus together form a continuous passage that carries            sound from outside the ear to inside the ear when the device            is inserted in the concha of the ear of the subject.

In some embodiments, the invention provides a method of attenuating asound entering an ear of a subject, the method comprising inserting intothe ear of the subject a device, the device comprising:

-   -   a) a first portion, wherein the first portion comprises:        -   i) a sound inlet;        -   ii) a face that faces an ear canal of the subject; and        -   iii) a face that faces away from the ear canal of the            subject,            wherein the first portion is inserted in a concha of the ear            of the subject, and the sound inlet is positioned to face            away from the ear canal of the subject, wherein the first            portion comprises a tab that curves away from the ear canal            of the subject;    -   b) a hollow tube, wherein the hollow tube is attached to the        face of the first portion that faces the ear canal of the        subject, wherein the hollow tube is positioned to protrude into        the ear canal of the subject;    -   c) a first seal, wherein the first seal has a body that has a        wide end and a narrow end, and the body of the first seal tapers        in size from the wide end to the narrow end, wherein the first        seal contains an aperture that is about circular through which        the hollow tube protrudes, and wherein the first seal fits over        the hollow tube at a point that is proximal to the face of the        first portion that faces the ear canal, wherein the first seal        is situated at about the opening of the ear canal of the        subject; and    -   d) a second seal, wherein the second seal fits over the hollow        tube at a point that is more distal from the first portion than        the point at which the first seal fits over the hollow tube,        wherein the second seal comprises an open terminus that is        situated inside of the ear canal of the subject,        -   wherein the hollow tube is flexible and is positioned inside            the ear canal of the subject, and the hollow tube houses a            sound bore, and        -   wherein the sound bore, the sound inlet, and the open            terminus together form a continuous passage that carries            sound from outside the ear to inside the ear of the subject.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view of the present invention in the human ear.

FIG. 2 is a cross sectional view of the present invention inserted intothe human ear canal.

FIG. 3 is a top-down view of the present invention with integrated soundbore.

FIG. 4 is a cross sectional view of the inner seal portion andattenuation filter of the present invention.

FIG. 5 depicts an embodiment of the present invention.

FIG. 6 depicts an embodiment of the present invention at panels A and B.

FIG. 7 depicts an embodiment of the present invention.

FIG. 8 illustrates cross sectional views of the main unit of anembodiment of the present invention at panels A-E.

FIG. 9 illustrates cross sectional views of a small version of theinner, middle, and outer seal of an embodiment of the present inventionat panels A-C.

FIG. 10 illustrates cross sectional views of a large version of theinner, middle, and outer seal of an embodiment of the present inventionat panels A-C.

DETAILED DESCRIPTION

Many types of foam and elastic materials are used to produce pre-moldedand custom hearing protection devices. High quality earplugs arecomfortable, but are expensive because custom molding is required.One-size-fits-most earplugs that are cosmetically appealing and attemptto deliver minimally-distorted sound at an affordable price are oftenimproperly used and thus fail to achieve suitable levels of protectionor deliver minimally distorted sound.

The disclosed invention describes a cost-effective earplug device thatdelivers minimally-distorted sound, offers sound protection, can fitmost users, is cosmetically appealing, and can protect human hearingfrom dangerously high acoustic levels without the cost or inconvenienceof a custom earplug. In some embodiments, the invention can attenuateenvironmental sounds to a safe level, for example, typically less than85 dB sound pressure levels in the ear.

The invention is a device comprising an intracanal sealing system and anintegral external concha tab that can achieve a desired level ofattenuation at a regulated depth of insertion. The sealing systemdescribed herein provides enhanced attenuation of sound and minimizesacoustical distortion caused by the presence of the device in the earcompared to other designs. The invention further comprises an acousticresonance channel tube, which allows sound to reach the tympanicmembrane and maintain sound quality appropriate for listening to musicand speech. The invention further comprises the use of elastomericmaterials to achieve proper fit, retention, and comfort.

The disclosed invention comprises a main body piece that is positionedto fit in the concha of the human ear. In some embodiments, the externalhardware piece is used to move the internal portion of the device intothe ear canal, allowing for proper placement of the device and soundinlet. Once inserted, the internal portion of the device contacts thecanal and holds the device in place. In some embodiments, the main bodypiece can also prevent the user from intentionally or unintentionallyinserting the device too deeply. In some embodiments, the externalhardware piece is used to remove the entire device from the ear. In someembodiments, the invention fits a concha that is about 15 mm, about 16mm, about 17 mm, about 18 mm, about 19, or about 20 mm wide. In someembodiments, the invention fits a concha that is about 15 mm wide. Insome embodiments, the invention fits a concha that is about 17.5 mmwide. In some embodiments, the invention fits a concha that is about 20mm wide.

In some embodiments, the invention fits a concha that is about 10 mm,about 11 mm, about 12 mm, about 13 mm, about 14 mm, or about 15 mm deep.In some embodiments, the invention fits a concha that is about 11 mmdeep. In some embodiments, the invention fits a concha that is about 13mm deep. In some embodiments, the invention is modified to fit conchasof different sizes, for example, the device can be modified to fit theaverage size of a child's concha.

In some embodiments, the main body of the device is made of a hardplastic, such as acrylonitrile butadiene styrene (ABS) plastic. In someembodiments, the main body is made of a soft material, such as siliconeovermolding, soft silicone, or a thermoplastic elastomer. In someembodiments, the main body is made of only hard plastic. In someembodiments, the main body is made of only soft silicone. In someembodiments, the main body is made of a combination of hard plastic andsoft silicone. In some embodiments, the main body comprises a stampedmetal or alloy logo, such as a stamped copper logo. In some embodiments,the main body comprises a stamped indication of fit to the right (“R”)or left (“L”) ear.

In some embodiments, the main body piece is about 10 mm, about 11 mm,about 12 mm, about 13 mm, about 14 mm, about 15 mm, about 16 mm, about17 mm, about 18 mm, about 19 mm, or about 20 mm long. In someembodiments the main body piece is about 13 mm, about 14 mm, about 15mm, or about 16 mm long. In some embodiments, the main body piece isabout 15.86 mm long. In some embodiments, the main body piece is about 8mm, about 9 mm, about 10 mm, about 11 mm, about 12 mm, about 13 mm,about 14 mm, or about 15 mm tall. In some embodiments, the main bodypiece is about 11 mm, about 12 mm, or about 13 mm tall. In someembodiments, the main body piece is about 11.70 mm tall. In someembodiments, the main body piece is modified to different sizes, forexample, the device can be modified to fit the average size of a child'sconcha and ear canal.

The invention also comprises a sound inlet that receives environmentalsounds. The sound inlet, which is contiguous with a sound bore, islarger in diameter than the diameter of the sound bore. The sound inlettransmits sound to the tympanic membrane. In some embodiments, the soundbore is about 2 mm, about 3 mm, about 4 mm, or about 5 mm wide. In someembodiments, the sound inlet is about 3 mm or about 4 mm wide. In someembodiments, the sound bore is about 3.04 mm wide.

The sound bore is an acoustic resonantor for resonant sounds of about 2kHz, about 3 kHz, about 4 kHz, about 5 kHz, about 6 kHz, about 7 kHz, orabout 8 kHz. In some embodiments, the sound bore is designed to be anacoustic resonator for resonant sounds that are about 2 kHz. In someembodiments, the sound bore is designed to be an acoustic resonator forresonant sounds that are about 3 kHz. In some embodiments, the soundbore is designed to be an acoustic resonator for resonant sounds thatare about 4 kHz. In some embodiments, the sound bore is designed toachieve acoustic resonance from about 2.5 kHz to about 2.8 kHz. In someembodiments, the sound bore is designed to achieve acoustic resonancefrom about 2.6 kHz to about 2.7 kHz. In some embodiments, the sound boreis designed to achieve acoustic resonance at about 2.7 kHz.

In some embodiments, the sound bore is about 25 mm, about 26 mm, about27 mm, about 28 mm, about 29 mm, about 30 mm, about 31 mm, about 32 mm,about 33 mm, about 34 mm, or about 35 mm long. In some embodiments, thesound bore is about 25 mm long. In some embodiments, the sound bore isabout 30 mm long. In some embodiments, the sound bore is about 33 mmlong. In some embodiments, the sound bore is about 35 mm long. In someembodiments, the sound bore is made of a polyvinyl chloride-typeplastic. In some embodiments, the sound bore is molded into the mainbody piece.

The sound bore of the device can be bent or kinked such that the devicedoes not protrude from the ear. In some embodiments, the sound bore hasa kink that is about 5 mm, about 6 mm, about 7 mm, about 8 mm, about 9mm, about 10 mm, about 11 mm, about 12 mm, about 13 mm, about 14 mm,about 15 mm, about 16 mm, about 17 mm, about 18 mm, about 19 mm, about20 mm, about 21 mm, about 22 mm, about 23 mm, about 24 mm, or about 25mm from the sound inlet. In some embodiments, the sound bore has a kinkthat is about 16 mm or about 17 mm from the sound inlet. In someembodiments, the sound bore has a kink that is about 16.5 mm from thesound inlet.

In some embodiments, the sound bore is cased in a flexible hollow tube.In some embodiments, the flexible hollow tube is straight. In someembodiments, the flexible hollow tube is curved. In some embodiments,the flexible hollow tube is curved and assures proper depth placement ofthe device. In some embodiments, the flexible hollow tube is held by themain body piece and is tucked under the antitragus, which assures acosmetic appeal, proper depth placement, and secure placement of theearpiece. In some embodiments, the flexible hollow tube is positioned bythe external hardware to orient toward the direction of incoming sound.In some embodiments, the flexible hollow tube is about 10 mm, about 11mm, about 12 mm, about 13 mm, about 14 mm, or about 15 mm long. In someembodiments, the flexible hollow tube is about 10 mm, about 11 mm, orabout 12 mm long. In some embodiments, the flexible hollow tube is about11.42 mm long.

The hollow tube can connect to a face of the external portion of thedevice that is directed toward the ear canal when in use. The hollowtube can be disposed to the face at an angle that is, for example, atleast 45 degrees, at least 50 degrees, at least 55 degrees, at least 60degrees, at least 65 degrees, at least 70 degrees, at least 75 degrees,at least 80 degrees, at least 85 degrees, about 45 degrees, about 50degrees, about 55 degrees, about 60 degrees, about 65 degrees, about 70degrees, about 75 degrees, about 80 degrees, about 85 degrees, or about90 degrees. For example, the hollow tube can be about perpendicular tothe face, or within about 5 degrees, about 10 degrees, about 15 degrees,about 20 degrees, or about 25 degrees of perpendicularity.

The disclosed invention further comprises an outer seal that is sizedand shaped to fit the entry portion of most human ear canals. The outerseal is sized to fit an average-sized ear canal that is about 20 mm,about 21 mm, about 22 mm, about 23 mm, about 24 mm, about 25 mm, about26 mm, about 27 mm, about 28 mm, about 29 mm, or about 30 mm in length.In some embodiments, the outer seal is sized to fit an ear canal that isabout 20 mm in length. In some embodiments, the outer seal is sized tofit an ear canal that is about 25 mm in length. In some embodiments, theouter seal is sized to fit an ear canal that is about 30 mm in length.

In some embodiments, the outer seal is sized and shaped to fit the ovalopening of an ear canal that is about 12 mm×about 10 mm. In someembodiments, the outer seal is sized and shaped to fit the oval openingof an ear canal that is about 9 mm×about 6.5 mm. In some embodiments,the outer seal is about 15 mm×about 15 mm in size and is compressiblesuch that the concha can prevent over-insertion of the device into theear canal. In some embodiments, the outer seal is about 13 mm×about 10mm in size and is compressible to prevent over insertion into the earcanal. In some embodiments, the outer seal is about 12.4 mm×about 9.2 mmin size and is compressible to prevent over insertion into the earcanal.

The disclosed invention further comprises an inner seal that isconnected to the outer seal by the flexible tube, which also enclosesthe sound bore. The inner seal provides additional sound attenuation andseals the deeper portion of the ear canal to minimize the occlusioneffect. The occlusion effect occurs when an object fills the outerportion of a person's ear canal, and that person perceives boomingecho-sounds of their own voice.

The inner seal can be positioned at the end of the sound bore and allowssound to enter the volume between the inner seal and the tympanicmembrane. In some embodiments, the seal is made from very pliable andsoft elastomeric material. In some embodiments, the seal is made fromsoft silicone. In some embodiments, the seal is made from athermoplastic polymer. In some embodiments, the seal of made from athermoplastic polymer such as solid or open foam (i.e., open cell orclosed cell polymers).

The disclosed invention can utilize a dual-sealing mechanism. The outerseal of the device described herein can be denser and harder than theinner seal of the device. The denser more rigid outer seal of the devicecan provide superior sound attenuation of foam or pre-molded elastomersemicircular features. The inner seal can be made of a softer materialthat can sit comfortably in the ear canal. In some embodiments, theratio of the hardness or density of the outer seal to the density of theinner seal is about 1:1, about 2:1, about 3:1, about 4:1, about 5:1,about 6:1, about 7:1, about 8:1, about 9:1, about 10:1, about 11:1,about 12:1, about 13:1, about 14:1, about 15:1, about 16:1, about 17:1,about 18:1, about 19:1, or about 20:1. In some embodiments, the ratio ofthe density of the outer seal to the density of the inner seal is about4:1.

In some embodiments, the described invention can comprise friction fitsilicone tips that act as additional seals. In some embodiments, theinvention comprises friction fit silicone tips with 1, 2, or 3 seals. Insome embodiments, the invention comprises a friction fit silicone tipwith one seal. In some embodiments, the invention comprises a frictionfit silicone tip with two seals. In some embodiments, the inventioncomprises a friction fit silicone tip with three seals.

In some embodiments, the friction fit silicone tip is about 10 mm, about11 mm, about 12 mm, about 13 mm, about 14 mm, about 15 mm, about 16 mm,about 17 mm, about 18 mm, about 19 mm, or about 20 mm long. In someembodiments, the friction fit silicone tip is about 15 mm, about 16 mm,about 17 mm, or about 18 mm long. In some embodiments, the friction fitsilicone tip is about 17.39 mm long. In some embodiments, the frictionfit silicone tip that acts as the inner seal is about 5 mm, about 6 mm,about 7 mm, about 8 mm, about 9 mm, or about 10 mm deep. In someembodiments, the friction fit silicone tip that acts as the inner sealis about 5 mm, about 6 mm, or about 7 mm deep. In some embodiments, thefriction fit silicone tip is about 6.21 mm deep.

The invention also comprises an attenuating filter that is located nearthe inner seal of the device. The attenuating filter is made of asemi-permeable material that can reflect some portion of the sound, andallows some sound to pass through the filter. The reflected soundprovides via the sound bore a quarter wave resonant cavity. Theattenuating filter further tunes the acoustic frequencies and achieves amore realistic sound quality. The attenuating filter also providesacoustic resistance and thus provides a secondary feature to the soundbore. The distance from the sound inlet to the tympanic membraneprovides one resonant peak, and the distance from the sound inlet to theattenuating filter provides a second resonant peak. In some embodiments,the second resonant peak is the dominant peak.

An attenuating filter made of acoustically-resistant material can allowthe user to fine tune the overall sound quality of the device. In someembodiments, the attenuating filter is made of fine wool, fine beads ofmetal or polymer material fused to form a plug, or a polymer strandweaved material. In some embodiments, the attenuating filter is madefrom another material that is intended to filter the acoustic sound.

The attenuating filter of the disclosed invention can be large enough tocover the entire opening of the sound bore. In some embodiments, theattenuating filter is about 1 mm, about 2 mm, or about 3 mm in diameterand about 1 mm, about 2 mm, or about 3 mm tall. In some embodiments, theattenuating filter is about 1 or about 2 mm in diameter and about 1 mmor about 2 mm tall. In some embodiments, the attenuating filter is about1.53 mm in diameter and about 1.88 mm tall.

In some embodiments, the described device can be about 20 mm, about 21mm, about 22 mm, about 23 mm, about 24 mm, about 25 mm, about 26 mm,about 27 mm, about 28 mm, about 29 mm, or about 30 mm long. In someembodiments, the described device can be about 24 mm, about 25 mm, about26 mm, about 27 mm, or about 28 mm long. In some embodiments, thedescribed device can be about 26.55 mm long. In some embodiments, thedescribed device can be about 20 mm, about 21 mm, about 22 mm, about 23mm, about 24 mm, or about 25 mm wide. In some embodiments, the describeddevice can be about 22 mm, about 23 mm, or about 24 mm wide. In someembodiments, the described device can be about 23.79 mm wide. In someembodiments, the described device can be about 15 mm, about 16 mm, about17 mm, about 18 mm, about 19 mm, or about 20 mm deep. In someembodiments, the described device can be about 15 mm, about 16 mm, orabout 17 mm deep. In some embodiments, the described device can be about16.24 mm deep.

The disclosed invention can attenuate environmental sound levels to safelevels. In some embodiments, the device can be used to attenuateenvironmental sounds that are up to about 200 dB, up to about 190 dB, upto about 180 dB, up to about 170 dB, up to about 160 dB, up to about 150dB, up to about 140 dB, up to about 130 dB, up to about 125 dB, up toabout 120 dB, up to about 115 dB, up to about 110 dB, up to about 105dB, up to about 100 dB, up to about 95 dB, up to about 90 dB, up toabout 85 dB, up to about 80 dB, up to about 75 dB, up to about 70 dB, upto about 65 dB, up to about 60 dB, up to about 55 dB, or up to about 50dB. In some embodiments, the device can attenuate the environmentalsound by about 50%, about 45%, about 40%, about 35%, about 30%, about25%, about 20%, about 15%, about 10%, or about 5%. In some embodiments,the device can attenuate the environmental sound by about 1 dB, about 2dB, about 3 dB, about 4 dB, about 5 dB, about 10 dB, about 15 dB, about20 dB, about 25 dB, about 26 dB, about 27 dB, about 28 dB, about 29 dB,about 30 dB, about 35 dB, about 40 dB, about 45 dB, or about 50 dB. Insome embodiments, the frequency of the sound being attenuated is about100 Hz, about 125 Hz, about 150 Hz, about 175 Hz, about 200 Hz, about300 Hz, about 400 Hz, about 500 Hz, about 600 Hz, about 700 Hz, about800 Hz, about 900 Hz, about 1000 Hz, about 1250 Hz, about 1500 Hz, about1750 Hz, about 2000 Hz, about 2250 Hz, about 2500 Hz, about 2750 Hz,about 3000 Hz, about 3250 Hz, about 3500 Hz, about 3750 Hz, about 4000Hz, about 4250 Hz, about 4500 Hz, about 4750 Hz, about 5000 Hz, about5250 Hz, about 5500 Hz, about 5750 Hz, about 6000 Hz, about 6250 Hz,about 6500 Hz, about 6750 Hz, about 7000 Hz, about 7250 Hz, about 7500Hz, about 7750 Hz, or about 8000 Hz.

In some embodiments, the disclosed invention can attenuate theenvironmental sound by about 25 dB across frequencies from about 125 to8000 Hz. In some embodiments, the disclosed invention can attenuate theenvironmental sound by about 15 dB across frequencies from about 125 to8000 Hz. In some embodiments, the disclosed invention can attenuate theenvironmental sound by about 25 dB across frequencies from about 500 to3000 Hz. In some embodiments, the disclosed invention can attenuate theenvironmental sound by about 15 dB across frequencies from about 500 to3000 Hz. In some embodiments, the disclosed invention can attenuate theenvironmental sound by about 25 dB across frequencies from about 1000 to3000 Hz. In some embodiments, the disclosed invention can attenuate theenvironmental sound by about 15 dB across frequencies from about 1000 to3000 Hz.

EXAMPLES Features of the Invention

FIG. 1 depicts a side view of the present invention in the human ear.The tragus and antitragus of the pinna 100 of the human ear partiallyocclude the invention. The tragus is a small cartilaginous flap thatcovers the ear canal. The device is positioned in the concha of thehuman ear by feature 101. The concha is a bowl-shaped feature within thepinna 100 and adjacent to the ear canal. The dimensions of the conchacan vary from user to user, but the average diameter of the concha isabout 15 mm to about 20 mm (0.6 in to 0.8 in) and the average depth isapproximately 13 mm (0.5 in). The user can press the device into the earwithout regard for over insertion by feature 101. The sound inlet 102receives environmental sounds and is contiguous with the path of theacoustical sound bore 107, depicted in FIGS. 3 and 4, which transmitssound to the tympanic membrane.

FIG. 2 illustrates a cross sectional view of the outer ear canal andpinna of the human ear and the present invention. The ear canal(auditory canal; external auditory meatus) is an “S” shaped duct, whichprovides an access route for acoustic waves to travel to the tympanicmembrane. The average length of an adult ear canal is approximately 25mm (1.0 in) with a standard deviation of approximately 2 mm (0.2 in),and is approximately 5% longer in males than in females. The shape andcross sectional dimensions of the ear canal change along the length. Theoval opening of the canal has average dimensions of about 9 mm (0.4 in)by about 6.5 mm (0.3 in), and the canal becomes narrower along thelength. The outer seal 103 is sized and shaped to fit in most humancanals. The outer seal 103 is limited in length and is conical togenerally match the contour of the ear canal prior to the second bend.The shape (ovoid), size (major axis 12.4 mm by minor axis 9.2 mm), andcompressibility of 103 prevents over-insertion in most human ear canals.Additional sizes, shapes, and compressibility can be used to fit varioususers depending on size and preferences. A flexible tube 104 joins theinner seal 105 to the outer seal 103. 104 is a hollow member that is apart of the sound bore 107 (FIGS. 3 and 4). The inner seal 105 providesadditional sound attenuation and seals the deeper portion, also referredto as the bony section of the ear canal, to minimize the occlusioneffect. Because 105 is positioned deep in the ear, 105 is made from avery pliable and soft elastomeric material. 105 also is the terminationfor acoustical sound bore 107 (FIGS. 3 and 4), allowing sound to enterthe volume between 105 and the tympanic membrane. 106 is a portion of101 that is designed to incorporate the sound inlet port 102, and toorient the port forward in the direction of incoming sound. 102 can belocated and oriented in other aspects of 101 or 106 to desired shape orto tune incoming sound.

FIG. 3 illustrates the path of the sound bore 107 (dotted line) throughthe present invention. 107 is designed to be an acoustical resonator,and more specifically, of resonant sound in the 2-4 kHz range. Forexample, a channel length of 33 mm can achieve acoustical resonance at2700 Hz. If 107 were instead a straight tube, the tube could protrudefrom the ear canal in an awkward manner, but more importantly, astraight tube can be dangerous in that any blow to the head could drivethe earpiece too deep into the ear canal. By incorporating sound bore107 into 101, the present invention achieves both the appropriate lengthin an aesthetically-appealing manner with the additional benefit ofproviding features that assure proper depth placement of the inventivedevice. Features 106 and 101 have the additional benefit that for mostuser's ears, 106 is tucked under the antitragus and 101 is tucked underthe tragus. This configuration provides additional assurance that theearpiece will not dislodge and fall out of the user's ear.

In more detail, 106 is a portion of the 101 tab. Portion 106 is designedto curve along the inferior portion of the concha such that it presentsthe sound inlet 102 in the direction of incoming sound. Preferably,sound directly in front of the person is usually of greatest interest.106 is also mechanically-integrated with 101, 103, 104, and 105 suchthat 106 can be used by the user to remove the entire device from theear. A user can easily grip and withdraw the entire ear plug bydisplacing the antitragus slightly to gain access to 106 and thengrasping 106 between thumb and index finger.

The sound bore 107 prevents acoustical normal resonance. This featurecan be beneficial for any ear plug that resides in the ear canal. 107provides a key feature in achieving attenuated but unadulterated soundperception. 107 can be molded into the earpiece or can be formed bymolding an extruded or injection molded tube into the housing thatincorporates 101, 103, 104, and 105. 107 can be a singular channel asshown, or as multiple channels. For example, the channel bore, ormultiple channels, can have an effective cross sectional area of 2.5mm². The cross sectional area can be increased to allow greatermid-frequencies, or can be decreased to allow fewer mid-frequencies,through to the ear.

FIG. 4 shows the incorporation of an attenuating filter 108 located nearor in the inner seal 105. The attenuating filter 108 further tunes theacoustical frequencies to achieve a flatter, more realistic quality ofsound. 108 also provides acoustical resistance and thus, provides asecondary feature to the sound bore 107 so that the distance from thesound inlet 102 to the tympanic membrane provides one resonant peak, andthe distance from the sound inlet 102 to the attenuating filter 108provides a second resonant peak. Judicious use of an acousticallyresistant material in 108 allows tuning of the overall sound quality ofthe device. 108 can be made from fine wool, fine beads of metal orpolymer material fused to form a plug, or a polymer strand weavedmaterial, or other materials intended to filter the acoustic signal.

FIG. 5 depicts an exploded view of an embodiment of the presentinvention, which includes a main unit 501A, a sound bore 501B, soundinlet 502, an inner seal 503A, a middle seal 503B, an outer seal 503C,and an attenuating filter 504. The sound inlet 502 attaches to the outerframe of the main unit 501A, which then allows environmental sounds totravel to the device via main unit 501A and sound bore 501B. Theattenuating filter 504 is located within the sound bore 501B and isconfigured to filter the incoming sound. The inner seal 503A, the middleseal 503B, and the outer seal 503C attach to the main unit byencapsulating the sound bore 501B. The seal can be made of flexibleplastic material to fit the contour of the ear canal and to minimize orprevent environmental sounds from directly entering the ear canal.

FIG. 6 at panel A depicts an exploded view of an embodiment of thepresent invention, which includes a main unit 601 comprising a soundinlet 601A and a sound bore 601B, sound bore 602, an inner seal 603A, amiddle seal 603B, an outer seal 603C, and an attenuating filter 604. Thesound bore 602 is internally attached to the main unit 601A and controlsthe frequency of the environmental sounds that enter the device via mainunit 601A and sound bore 601B. The cross sectional area of 602 can beincreased to allow greater mid-frequencies, or can be decreased to allowfewer mid-frequencies, through to the ear. The attenuating filter 604 islocated within the sound bore 601B and is configured to filter theincoming sound. The inner seal 603A, the middle seal 603B, and the outerseal 603C attach to the main unit by encapsulating the sound bore 601B.FIG. 6 at panel B depicts an overlay of an embodiment of the presentinvention.

FIG. 7 depicts an exploded view of an embodiment of the presentinvention, which includes a main unit 701 comprising a sound inlet 701Aand a sound bore 701B, an inner seal 702A, a middle seal 702B, an outerseal 702C, and an attenuating filter 703. The attenuating filter 703 islocated within the sound bore 701B and is configured to filter theincoming sound. The inner seal 703A, the middle seal 703B, and the outerseal 703C attach to the main unit by encapsulating the sound bore 701B.

FIG. 8 at panels A-E illustrates cross sectional views of the main unit801 of an embodiment of the present invention, which comprises a soundinlet 801A and a sound bore 801B. The length of the sound bore 801B is11.42 mm and the width of the sound inlet 801A is 3.04 mm.

FIG. 9 at panels A-C illustrates cross sectional views of the smallversion of the inner seal 901A, middle seal 901B, and outer seal 901C,which position the present invention onto the ear canal of the user.

FIG. 10 at panels A-C illustrates cross sectional views of the largeversion of the inner seal 1001A, middle seal 1001B, and outer seal1001C, which position the present invention onto the ear canal of theuser.

What is claimed is:
 1. A device for attenuating a sound entering an ear of a subject, the device comprising: a) a first portion, wherein the first portion comprises: i) a sound inlet; ii) a face that faces an ear canal of the subject; and iii) a face that faces away from the ear canal of the subject, wherein the first portion is configured to be situated in a concha of the ear of the subject, and the sound inlet is positioned to face away from the ear canal of the subject when the device is inserted in the concha of the ear of the subject, wherein the first portion comprises a tab that curves away from the ear canal of the subject when the device is inserted in the concha of the ear of the subject; b) a hollow tube, wherein the hollow tube is attached to the face of the first portion that faces the ear canal of the subject, wherein the hollow tube is positioned to protrude into the ear canal of the subject when the device is inserted in the concha of the ear of the subject; c) a first seal, wherein the first seal has a body that has a wide end and a narrow end, and the body of the first seal tapers in size from the wide end to the narrow end, wherein the first seal contains an aperture that is about circular through which the hollow tube protrudes, and wherein the first seal fits over the hollow tube at a point that is proximal to the face of the first portion that faces the ear canal, wherein the first seal is situated at about the opening of the ear canal of the subject when the device is inserted in the concha in the ear of the subject; and d) a second seal, wherein the second seal fits over the hollow tube at a point that is more distal from the first portion than the point at which the first seal fits over the hollow tube, wherein the second seal comprises an open terminus that is situated inside of the ear canal of the subject when the device is inserted in the concha of the ear of the subject, wherein the hollow tube is flexible and is positioned to fit inside the ear canal of the subject, and the hollow tube houses a sound bore, and wherein the sound bore, the sound inlet, and the open terminus together form a continuous passage that carries sound from outside the ear to inside the ear when the device is inserted in the concha of the ear of the subject.
 2. The device of claim 1, wherein the device further comprises a sound attenuating filter, wherein the sound attenuating filter is situated in the hollow tube at a point that is more proximal to the second seal than to the first seal.
 3. The device of claim 1, wherein the hollow tube is connected to the face of the first portion that faces the ear canal of the subject at an angle of at least 45 degrees.
 4. The device of claim 1, wherein the hollow tube is connected to the face of the first portion that faces the ear canal of the subject at an angle that is within 25 degrees of perpendicularity to the face of the first portion that faces the ear canal of the subject.
 5. The device of claim 1, wherein the second seal has a body that has a wide end a narrow end, the body of the second seal tapers in size from the wide end to the narrow end, and the open terminus is at the narrow end.
 6. The device of claim 5, wherein the second seal has a rim at the open terminus, wherein a diameter of the rim is not parallel to the face of the first portion that faces the ear canal of the subject.
 7. The device of claim 5, wherein the device further comprises a third seal, wherein the third seal has a body that has a wide end and a narrow end, and the body of the third seal tapers in size from the wide end to the narrow end, wherein the wide end of the body of the third seal is attached over the narrow end of the body of the first seal, and wherein the wide end of the body of the second seal is attached over the narrow end of the body of the third seal.
 8. The device of claim 1, wherein the first seal has a greatest diameter that is larger than the greatest diameter of the second seal.
 9. The device of claim 1, wherein the first seal has a hardness that is greater than that of the second seal.
 10. The device of claim 1, wherein the first seal has a density that is greater than that of the second seal.
 11. A method of attenuating a sound entering an ear of a subject, the method comprising inserting into the ear of the subject a device, the device comprising: a) a first portion, wherein the first portion comprises: i) a sound inlet; ii) a face that faces an ear canal of the subject; and iii) a face that faces away from the ear canal of the subject, wherein the first portion is inserted in a concha of the ear of the subject, and the sound inlet is positioned to face away from the ear canal of the subject, wherein the first portion comprises a tab that curves away from the ear canal of the subject; b) a hollow tube, wherein the hollow tube is attached to the face of the first portion that faces the ear canal of the subject, wherein the hollow tube is positioned to protrude into the ear canal of the subject; c) a first seal, wherein the first seal has a body that has a wide end and a narrow end, and the body of the first seal tapers in size from the wide end to the narrow end, wherein the first seal contains an aperture that is about circular through which the hollow tube protrudes, and wherein the first seal fits over the hollow tube at a point that is proximal to the face of the first portion that faces the ear canal, wherein the first seal is situated at about the opening of the ear canal of the subject; and d) a second seal, wherein the second seal fits over the hollow tube at a point that is more distal from the first portion than the point at which the first seal fits over the hollow tube, wherein the second seal comprises an open terminus that is situated inside of the ear canal of the subject, wherein the hollow tube is flexible and is positioned inside the ear canal of the subject, and the hollow tube houses a sound bore, and wherein the sound bore, the sound inlet, and the open terminus together form a continuous passage that carries sound from outside the ear to inside the ear of the subject.
 12. The method of claim 11, where the device attenuates a sound within a frequency range of about 120 Hz to about 8000 Hz.
 13. The method of claim 11, wherein the device attenuates a sound within a frequency range of about 1000 Hz to about 3000 Hz.
 14. The method of claim 11, wherein the device attenuates a sound by about 15 dB to about 30 dB.
 15. The method of claim 11, wherein the device attenuates a sound by about 25 dB.
 16. The method of claim 11, wherein the attenuation of sound by the device is constant through a frequency range of about 125 Hz to about 8000 Hz.
 17. The method of claim 11, wherein the device attenuates a sound by about 10 dB to about 30 dB through a frequency range of about 125 Hz to about 8000 Hz. 